#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main()
{
	freopen("sub.in","r",stdin);
	freopen("sub.out","w",stdout);
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int T;cin>>T;
	while(T--)
	{
		int a,b;
		cin>>a>>b;
		if((a<=0&&b<=0)||(a>=0&&b>=0)) cout<<"0\n";
		else cout<<min({abs(a+b),abs(a),abs(b)})<<'\n'; 
	}
	return 0;
}

